Видео ютуба по тегу Angular Bootstrap Undefined Variable

'SassError undefined variable' with Angular 9 and Bootstrap 4 out-of-the-box (2 Solutions!!)
'SassError undefined variable' with Angular 9 and Bootstrap 4 out-of-the-box (2 Solutions!!)
Angular Bootstrap Errors (SassError: Can't find stylesheet to import, Undefined variable) - Easy Fix
Angular Bootstrap Errors (SassError: Can't find stylesheet to import, Undefined variable) - Easy Fix